microsoft / microsoft/aurora

Metadata time in Databricks

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Python
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Description

Hello,

i'm running Aurora on a GPU H100 on Databricks. I'm using ECMWF data from the 00 run.

When i add the time location in my script

import time, os
os.environ['TZ'] = 'Europe/Rome'
time.tzset()

Aurora's forecast differs from the one obtained without specifying the time zone.
In both cases i set the time metadata as time = Timestamp('2025-09-11 00:00:00') this is a UTC time based on ECMWF data

Do I have to set the timezone or not?

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Research direction

Start by reproducing the two cases in the issue: the ECMWF 00 run with Timestamp('2025-09-11 00:00:00'), both with and without the TZ setting and time.tzset(). Compare the resulting Aurora forecasts and establish the expected timezone handling for the metadata; done means the behavior is understood and documented or corrected.

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Assessment

Tech stack
python
Domain
machine-learning
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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